From: Andrew Morton <akpm@linux-foundation.org>
To: ebiederm@xmission.com (Eric W. Biederman)
Cc: Ingo Molnar <mingo@elte.hu>, Jan Beulich <jbeulich@novell.com>,
tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
linux-kernel@vger.kernel.org, Gautham R Shenoy <ego@in.ibm.com>,
Peter Zijlstra <peterz@infradead.org>,
Alexey Dobriyan <adobriyan@gmail.com>, <netdev@vger.kernel.org>
Subject: Re: [PATCH 2/2] sysctl: lockdep support for sysctl reference counting.
Date: Fri, 10 Apr 2009 02:18:54 -0700 [thread overview]
Message-ID: <20090410021854.65c6662a.akpm@linux-foundation.org> (raw)
In-Reply-To: <m1ab7fxqxw.fsf_-_@fess.ebiederm.org>
On Sat, 21 Mar 2009 00:42:19 -0700 ebiederm@xmission.com (Eric W. Biederman) wrote:
> It is possible for get lock ordering deadlocks between locks
> and waiting for the sysctl used count to drop to zero. We have
> recently observed one of these in the networking code.
>
> So teach the sysctl code how to speak lockdep so the kernel
> can warn about these kinds of rare issues proactively.
`make headers_check':
/usr/src/25/usr/include/linux/sysctl.h:31: included file 'linux/lockdep.h' is not exported
make[2]: *** [/usr/src/25/usr/include/linux/.check] Error 1
It looks like we'll need version 2 on these patches..
next prev parent reply other threads:[~2009-04-10 9:27 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-12 13:21 [PATCH, resend] eliminate spurious pointless WARN_ON()s Jan Beulich
2009-03-12 13:48 ` Andi Kleen
2009-03-13 8:52 ` Peter Zijlstra
2009-03-13 1:39 ` [tip:core/ipi] generic-ipi: " Jan Beulich
2009-03-13 8:54 ` Peter Zijlstra
2009-03-13 9:21 ` [tip:core/ipi] generic-ipi: eliminate spurious pointlessWARN_ON()s Jan Beulich
2009-03-13 9:43 ` Peter Zijlstra
2009-03-13 10:38 ` Ingo Molnar
2009-03-19 22:14 ` Eric W. Biederman
2009-03-20 8:52 ` Ingo Molnar
2009-03-20 9:58 ` Eric W. Biederman
2009-03-20 18:24 ` Ingo Molnar
2009-03-20 18:52 ` Peter Zijlstra
2009-03-20 19:34 ` cpu hotplug and lockdep (was: Re: [tip:core/ipi] generic-ipi: eliminate spurious pointlessWARN_ON()s) Peter Zijlstra
2009-03-21 7:39 ` [PATCH 0/2] sysctl: lockdep support Eric W. Biederman
2009-03-21 7:40 ` [PATCH 1/2] sysctl: Don't take the use count of multiple heads at a time Eric W. Biederman
2009-03-21 7:42 ` [PATCH 2/2] sysctl: lockdep support for sysctl reference counting Eric W. Biederman
2009-03-30 22:26 ` Andrew Morton
2009-03-30 22:53 ` Eric W. Biederman
2009-03-30 23:18 ` Andrew Morton
2009-03-30 23:50 ` Eric W. Biederman
2009-03-31 8:10 ` Peter Zijlstra
2009-03-31 8:47 ` Eric W. Biederman
2009-03-31 8:17 ` Peter Zijlstra
2009-03-31 13:40 ` Eric W. Biederman
2009-03-31 15:35 ` Peter Zijlstra
2009-03-31 22:44 ` Eric W. Biederman
2009-04-10 9:18 ` Andrew Morton [this message]
2009-03-20 23:40 ` [tip:core/ipi] generic-ipi: eliminate spurious pointlessWARN_ON()s Eric W. Biederman
2009-03-21 10:20 ` Peter Zijlstra
2009-03-13 9:31 ` [tip:core/ipi] generic-ipi: eliminate spurious pointless WARN_ON()s Ingo Molnar
2009-03-13 10:36 ` [tip:core/ipi] generic-ipi: eliminate WARN_ON()s during oops/panic Ingo Molnar
2009-03-13 10:36 ` [tip:core/ipi] panic: decrease oops_in_progress only after having done the panic Ingo Molnar
2009-03-13 10:36 ` [tip:core/ipi] panic, smp: provide smp_send_stop() wrapper on UP too Ingo Molnar
2009-03-13 10:36 ` [tip:core/ipi] panic: clean up kernel/panic.c Ingo Molnar
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